RallyIQ

Game plan

Zhizhen Zhang v Tommy Paul

Every number combines what Zhizhen Zhang does well with what Tommy Paul allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Zhizhen Zhang wins, best of 3 10%90%: 2%–29% · best of 5: 6%
Serve points won 60.4% / 70.9% Zhizhen / Tommy · tour 63.5%
Strengths only, no similarity priors 13%serve 60.9% / 69.9%

Each player's serve and return strength is fitted against every opponent they were charted against, so a record built on weak opponents counts for less. Both were charted enough in the last three seasons, so those carry the most weight. The result is then nudged by Zhizhen Zhang's record against Tommy Paul's tactical lookalikes and in their charted head-to-heads (lookalikes: −6.8 on serve, −14.3 on return vs expectation (222 points)). A game-by-game Markov chain turns point odds into match odds; the 90% range covers the uncertainty in the two strengths, not the nudges. Charted matches lean toward big events, so treat this as a scouting estimate, not a betting line.

Head to head, per 100 shots

CareerZhizhenTommy
Direction choice−0.06 ±0.09
better than 41%
+0.09 ±0.06
better than 80%
Shot selection+0.03 ±0.20
better than 54%
+0.11 ±0.11
better than 67%
Execution−0.36 ±0.66
better than 51%
+0.22 ±0.32
better than 76%
Points left on the table2.50 ±0.14
lower than 61%
2.33 ±0.11
lower than 81%

Each player's career against an average tour player in the same position, adjusted for opponent strength, with a 90% margin (shots clustered by match). Points left on the table is the gap to the best-value direction for the same stroke, so lower is better. Percentiles are within each player's own tour. A side is highlighted only when the gap is larger than the margin on the difference.

Structural compatibility

Expected edge per 100 rally shots from style alone: Zhizhen Zhang −0.52, Tommy Paul +0.59. Each player's shot mix weighted by their own skill with each shot and by how much the other gives up against it. This is why some rankings gaps don't hold in a given matchup.

Serve plan

The share of points the server wins when a first serve lands in that direction (hover a rate for its 90% interval; ± is the 90% margin). "Matchup" combines the server's rate with how this returner handles that serve. "Optimal" is the mix that wins most against this returner once they start reading a habit, at the response measured across the tour, and only within the range servers' habits actually vary. The gain over the current mix is how exploitable that mix is.

Zhizhen Zhang serving

Deuce court

1st serveNowZhizhen winsv TommyMatchupOptimal
Wide43%72%72%71.2%±5.056% ▲
Body7%69%61%67.2%±9.80% ▼
T50%76%73%74.1%±4.844% ▼

Optimal v Tommy Paul: +0.4±0.6 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +1.8 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowZhizhen winsv TommyMatchupOptimal
Wide44%69%73%69.3%±5.538% ▼
Body8%57%63%57.0%±10.60% ▼
T49%75%65%68.8%±5.462% ▲

Optimal v Tommy Paul: +0.6±0.7 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +1.2 per 100 first serves in before the returner adjusts.

Tommy Paul serving

Deuce court

1st serveNowTommy winsv ZhizhenMatchupOptimal
Wide46%72%81%80.8%±4.059% ▲
Body14%67%65%68.3%±9.11% ▼
T40%77%77%79.5%±4.640%

Optimal v Zhizhen Zhang: +0.9±0.8 per 100 first serves (faults included) over the current mix. Serving wide every time would read +2.3 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowTommy winsv ZhizhenMatchupOptimal
Wide48%66%78%72.5%±4.948%
Body14%64%67%67.6%±10.21% ▼
T38%70%77%76.2%±5.251% ▲

Optimal v Zhizhen Zhang: +0.9±0.8 per 100 first serves (faults included) over the current mix. Serving T every time would read +3.0 per 100 first serves in before the returner adjusts.

Return plan

Value of each return, in points per 100 returns against an average return of the same serve (direction, court, surface): the tour's result with that return, the returner's own edge with it, and what this server gives up when it comes back to that side. Returns with no charted direction are left out, so values compare with each other rather than with zero. Depth isn't a choice here: missed returns have no depth. Serve quality isn't charted, so a block through the middle partly reflects the serve that forced it.

Zhizhen Zhang returning

1st serve to the forehand

ReturnNowTourOwnv TommyValue
FH through the middle40%+4.3+0.5+0.7+5.4±2.2
FH crosscourt23%+5.5±0.0+0.1+5.6±3.8
FH slice through the middle14%−4.2−0.2+0.7−3.8±2.2
FH down the line13%+1.7−5.0−0.9−4.2±3.9
FH slice crosscourt6%−4.3−2.7+1.3−5.7±2.7

Lean FH crosscourt: +3.7±3.1 per 100 returns v the current mix (342 returns charted)

1st serve to the backhand

ReturnNowTourOwnv TommyValue
BH through the middle37%+6.4+1.7+1.6+9.7±2.1
BH crosscourt27%+8.8+1.6+2.4+12.8±2.8
BH slice through the middle12%−4.2−1.2+1.0−4.4±2.4
BH slice crosscourt11%+0.5+0.9+0.6+2.0±3.0
BH down the line9%+4.2+0.2−1.5+2.9±4.1

Lean BH crosscourt: +6.2±2.3 per 100 returns v the current mix (368 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv TommyValue
FH through the middle45%−3.5−2.6+0.5−5.6±2.4
FH crosscourt35%−0.2+0.8+1.7+2.2±3.9
FH down the line20%−1.8−0.8+0.1−2.5±4.1

Lean FH crosscourt: +4.5±2.9 per 100 returns v the current mix (100 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv TommyValue
BH through the middle54%−2.9+2.0±0.0−0.8±1.9
BH crosscourt38%+1.0+1.3+0.4+2.8±2.6
BH down the line7%−0.2−1.2−0.7−2.2±4.3

Lean BH crosscourt: +2.3±1.9 per 100 returns v the current mix (268 returns charted)

Tommy Paul returning

1st serve to the forehand

ReturnNowTourOwnv ZhizhenValue
FH through the middle38%+4.3+2.5−0.6+6.1±2.1
FH down the line18%+1.7+3.0+0.6+5.2±3.9
FH slice through the middle16%−4.2−0.5−1.6−6.3±2.1
FH crosscourt15%+5.5+0.6−0.8+5.3±3.9
FH slice down the line9%−4.3+2.6−0.4−2.1±2.6

Lean FH through the middle: +3.6±1.7 per 100 returns v the current mix (1482 returns charted)

1st serve to the backhand

ReturnNowTourOwnv ZhizhenValue
BH through the middle38%+6.4+2.6−0.4+8.6±2.1
BH crosscourt24%+8.8+1.4+0.7+10.9±3.0
BH slice through the middle17%−4.2−1.3−0.9−6.4±2.2
BH down the line9%+4.2−2.0+1.2+3.5±4.5
BH slice crosscourt7%+0.5−3.0−2.3−4.8±3.0

Lean BH crosscourt: +6.7±2.5 per 100 returns v the current mix (1291 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv ZhizhenValue
FH through the middle40%−3.5+0.6−1.1−4.0±2.6
FH crosscourt32%−0.2+2.4+2.3+4.4±4.2
FH down the line22%−1.8+0.5−1.4−2.6±4.6
FH slice through the middle3%−12.7+0.5±0.0−12.2±1.3
FH slice crosscourt2%−12.5+0.3±0.0−12.2±1.6

Lean FH crosscourt: +5.8±3.2 per 100 returns v the current mix (401 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv ZhizhenValue
BH crosscourt45%+1.0+2.1−0.5+2.6±2.5
BH through the middle35%−2.9+2.3−0.7−1.2±1.9
BH down the line17%−0.2+4.3+1.6+5.7±4.7
FH through the middle2%−2.9+0.5−1.1−3.5±2.3
BH slice through the middle1%−11.3−1.7±0.0−13.0±1.1

Lean BH down the line: +4.2±4.1 per 100 returns v the current mix (825 returns charted)

Rally plan

Edge, in points per 100 shots: the hitter's skill with the shot (own) plus how much the receiver usually gives up against it (theirs), both measured against the tour average.

Zhizhen Zhang

Favour

ShotEdgeOwnTheirs
BH to their backhand · return+4.5±2.1+2.4+2.1
BH to the middle · return+2.4±1.5+1.4+1.1
FH to their forehand · return+1.7±3.4+1.1+0.7
FH to the middle · return +1+1.1±2.4+0.3+0.9
BH to the middle · return +1+0.5±2.0−0.6+1.2
FH to their forehand · rally+0.5±2.1−0.2+0.7

Avoid

ShotEdgeOwnTheirs
FH to their backhand · return−6.1±3.4−5.7−0.5
BH to their forehand · return−3.3±3.9−2.2−1.1
BH to their backhand · return +1−2.5±2.7−2.9+0.4
BH to their backhand · serve +1−2.3±2.5−2.2−0.1
BH to their forehand · rally−2.0±3.1−1.7−0.3

Tommy Paul

Favour

ShotEdgeOwnTheirs
BH to their forehand · serve +1+4.1±4.3+0.8+3.4
FH to their forehand · rally+2.8±2.0−0.6+3.4
BH to their forehand · return+2.7±3.8+1.0+1.7
FH to their forehand · return+2.3±3.7+1.4+0.9
FH to their backhand · serve +1+2.1±2.4+1.1+0.9
FH to their forehand · serve +1+1.6±2.7−0.1+1.8

Avoid

ShotEdgeOwnTheirs
FH to the middle · rally−2.2±1.7−0.6−1.7
FH to their forehand · return +1−2.2±3.2−1.9−0.4
BH slice to the middle · rally−2.1±2.1−0.8−1.3
FH to their backhand · return +1−1.8±3.3−2.6+0.8
BH to their forehand · rally−1.6±3.4+0.3−1.9

Against Tommy Paul-like opponents

Zhizhen Zhang vMatchesServe pts wonReturn pts won
All charted opponents–63.8%30.7%
Players most similar to Tommy Paul2 56.9%16.0%

Similar by tactical fingerprint: Stefanos Tsitsipas, Karen Khachanov, Laslo Djere, Roman Safiullin, Fabio Fognini, Borna Coric, David Goffin, Kei Nishikori, Lloyd Harris, Magnus Norman. When two players have rarely met, their records against these lookalikes fill the gap.